<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<style>
   .Left{
        width: 20%;
        height: 600px;
        line-height: 600px;
        text-align: center;
        background: #2e80c5;
        padding-top: 200px;
    }
</style>
<div class="Left">left</div>